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Title: Complex processing-morphology interrelationships DurinLy the reactive comvatibilization of blends of poly(butylene terephthalate) with epoxide-containing rubber
Authors: Martin, P ×
Devaux, Jacques
Legras, Roger
Leemans, Liesbeth
van Gurp, M
van Duin, M #
Issue Date: Jan-2004
Publisher: John wiley & sons inc
Series Title: Journal of applied polymer science vol:91 issue:2 pages:703-718
Abstract: Reactive processing of blends of poly(butylene terephthalate) (PBT) with the ethene-(methyl acrylate)-(glycidyl methacrylate) terpolymer (E-MA-GMA) is known to present a very complex reactivity since two competitive reactions take place spontaneously during melt blending, that is, blend compatibilization and rubber-phase crosslinking. In this article, the effects of several processing parameters, such as the shear rate, the processing temperature, and the matrix viscosity, on the reactive processing of those blends were investigated in terms of the blend morphology and of the amount of copolymer formed at the blend interface. It was shown that the morphology development could be divided in two successive regimes: In the early stages of the mixing process, the particle size is essentially deter-mined by the physical dispersion process, that is, breakup and coalescence, while, at longer mixing times, a further decrease in particle size is obtained as a result of the compatibilization reactions. The shift between the two regimes is progressive and intimately related to the processing conditions. Despite such a complexity, not only the blend morphology but also the elastic properties of the rubber particles can be controlled in a broad range by an adequate adjustment of the relative kinetics between both physical and chemical processes. (C) 2003 Wiley Periodicals, Inc.
ISSN: 0021-8995
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Research Centre for Pharmaceutical Care and Pharmaco-economics (-)
× corresponding author
# (joint) last author

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